<script type="text/javascript">
            var flage = 1,
                $tabBox = $('#tabBox');   //缓存
            function addTr(){
                flage ? indexTr = $('#tabBox').find('tr').size(): '';
                flage = 0;
                indexTr++;
                $tabBox.append('<tr><td>节点'+indexTr+'</td>' +
                        '<td><input id=jd'+indexTr+' type="text"/></td>' +
                        '<td>备注</td><td><input id=jdbz'+indexTr+' type="text"/></td></tr>');
            }
    </script>
